Rope thrusting shovel



Jan. '30, 1923.

W FERRI S.

THrwsT NG SHOVEL SHEETS-SHEET F r LED AUG MIT TOR/VEK.

Patented Jan. 30, 1923.

UNITED STATES PATENT OFFICE.

WALTER FERRIS, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO BUCYRUS COMPANY, OF

SOUTH MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN. I

ROPE THRUSTING SHOVEL.

Application filed August 3, 1921. Serial No. 489,407.

To all w/Lom- 'zit 'may concern Be it known that I, WALTER Fniuns, acitizen ot' the United States, residing at ltlilwaukee.` in thecounty ofMilwaukee and State of lViscon'sin, have invented a certain new anduseful Improvement. in Rope Thrusting Shovels, of which the following isa full, clear, concise, and exact description, reference being had tothe accompanying drawings, forming a part of this specification.

This invention relates tov power excavators, and more particularly, topower shovels' of that type in which the dipper handle` character ofprime mover with which the shovel may be provided.

Another object is the provision of a novel arrangement ot' parts,whereby the Working tension inftlie dipper hoisting cable may beutilized in effecting a shifting movement of the pivotal support for thedipper handle.

,Another object is the provision of an improved dipper shifting devicein which a single cable associated with the prime rnover may be employed.for effecting a shifting of the dipper handle independently of thehoisting action of the hoist gear.

Another object is the provision of a dipper shifting device that may beoperated vand controlledlfrom the hoisting and dragline drums, such asare ordinarily provided in certain types of power excavators.

Other objects and advantages will later appear.

'Two embodiments of the invention are iillustrated in the accompanyingdrawings,

in. which:

" Figure 1 -is a side elevation ot' a power.

shovel embodying the novel features ot' the present invention.

Figure 2 is a detail view on a larger scale of a portionv of. the dippershifting gear shown in Figure 1.

Figure 3 is a plan view of a portion of the boom and associated parts.

Figure 4 is a front elevation of the parts shown in Figure 2. i

yFigure 5 is a detail Iview of a portion of a dipper handle shiftinggear of somewhat dillierent form.

The shovel selected vfor illustration includes a wheeled truck 10,provided with a turntable 11, supporting a rotatable platform 12 in theusual manner. A hoisting Winch 13 is mounted upon the platform 12. Thehoisting Winch Iis driven fromf. any suitable p'rime mlover (not shown)through an appropriate gearing, a portion of which is shown at 14. Thehoisting Winch includes a main drum 15 and auxiliary drum 16, such, forinstance, as are commonly employed as hoisting and drag-linedrums,respectively, in some Well known types of excavators. These drumsare mounted for in- (not shown) of any standard or approvedconstruction.y A

A boom! 17 is pivotally mounted, as at 18, upon the platform 12. Theboom 17 pret'- erably comprises a pair of longitudinal channel bars 19rigidly secured together in spaced relation with their flanges 20lturned outwardly. The boom is supported in the usual manner by-4 thecable 21 and sheaves 22. A clipper 23 of standard 'construction iscarried by the boom. The dipper is provided With the usual dipper handle24 rigidly connected therewith and mounted for swinging movement about apivot 25. The pivot 25 is in the form of a pin or shaft carried by thecarriage 26 of any appropriate construction mounted for Inovement in asuitable guideWa-y 27 secured upon the boom 17. The guideway 27 is madeup of a pair of'ohannel. bars 27 extending between and secured to theinner faces of the i iii-limiti@ imi tension in cable channelbars 19.The anges 28 of the bars 27 are arranged to extend inwardly, thusconstituting appropriate tracks or runways for the rollers 29 mountedupon and supporting .the carriage 26. In order to increase the strengthand rigidity of the channel `bars 27, a cover plate 30 isl preferablyemployed, secured to the upper flanges 28. The construction andarrangement of parts thus far described is old and well known in the artso that a further or more detailed description thereof is deemedunnecessary.`

As above pointed out, the present inventio'n has to do with theprovision of novel means forv effecting and controlling the shifting ofthe dipper supporting pivot 25 along the guideway 27 to thus change theposition of the dipper and dipper handle relative to t-he boom 1T.plished by the use of novel cable connections between the dipper anddipper handle and the main power unit. This may be ac-l complished in`various ways. In the shovel shown, however, a cable 31. end wrappedabout the auxiliary drum 16, is connected with the carriage 26, as at 'Ihis calble is preferably passed over a sheave 33 mounted, asat 34, uponthe end of one otl the channel bars 27. The a1'- rangement is such thatwhen the cable 31 is drawn in under the action of the drum 16, thecarriage 26, together with the pivot 25 and dipper handle 24, is shiftedin one direction, preferably inwardly. Various provisions may be madefor opposing the 31 so as to shift the dipper handle 24 in the otherdirection when this cable is paid out. In this instance. the tension inthe dipper hoisting cable 35 is utilized for this purpose. The hoistingcable may be arranged in various ii-'ayswith this end in view. In theshovel shown, however, this cable 35 is connected with the hoisting drum15 in the usual manner and extends from the drum 15 over a sheave 36.preferably mounted adjacent the outer end of the boom 17, through apadlock sheave 37, connected with the. dipper 23, the other end of'thecable being wrapped about and anchored upon a drum 38. l second drum 38,preferably of smaller diameter than the drum 33, is secured thereto andconneeted with the carriage 26 by means of ai cable 35, having one endconnected to the carriage and the other end wrapped about the drum 3S.The cable 35 is thus made to support the dipper and the resultingtension therein is made tovoppose the tension in the cable 31 by reasonof the connection of cable 35 with thedipper handle through the mediumof the'drums 38 andv 38a the cable'35 v The cable 35, under the actionof the hoisting drum 15, performs the usual func! tions of raising andlowering the dipper way 27 AWithout This is accom-,

having one and and swinging the dipper handle about thei 16 and thedipper handle pivot 25 `may be shifted in either direction along theguiderequiring rotation ofthe hoisting drum. may be raised or loweredVat will by the hoisting drum 15 in the usual manner.

To illustrate the operation of the shovel described, assume that thedipper is in the lower initialdigging position, such as illustrated indotted lines in Figure 1, and that the drum 16 is lheld by its brakeagainst rotation. Upon rotation of the hoisting drum 15 in a clockwisedirection, the hoisting cable 35 is drawn in, the dipper is raised, andthe dipper handle swung about the pivot- 25. As long as the drum 16 1sheld against rotation. the. carriage 26 and pivot 25 are held againstoutward move,- ment along the guideway 27. As the digging progresses andit is desired to advance the effective swing of the dipper further intothe bank.- this is accomplished by releasing the drum 1G so as to payout the cable 31 to the desired extent. rlhis permits the carriage 26and pivot 25 to shift outwardly along the guideway 2i' `under theinfluence of the tension inthe. cable 35 so that the dipper handle ismoved outwardly and the effective swing of the dipper is advancedcorrespondingly. To return the pivot 25. and hence the dipperhandle., tothe inner position, it is only necessary to rotate the drum 16 in aclockwise vdirection so as to draw in the cable 31. This action forcesthe carriage-X26 and pivot 25 inwardly. against the influence of thetension in the. hoisting cable 35.

Vihen the digging stroke has been completed' and the dipper is clear ofthe bank, the dipper may be readily'shifted to an extreme outwardposition, such as shown in full line in Figure 1, and such as `might berequired Afor dumping purposes, by merely releasing the drum 16. Thepivot 25 and dipper are thus advanced in the manner above described. Toreturn the dipper to lower position for a fresh bite, it is onlyneeessary to release the hoisting drum 15 and to shift the pivotrearwardly it is only necessary to rotate the drum 16 in a clockwisedirection.

In the arrangement shown in Figure 5, the dipper handle 24 is pivotallysupported, as at 25, on a carriage 26 reciprocally mounted in thehorizontal gnideway 27,

Furthermore, the dipper fixed to the boom 17. As in the shovel abovedescribed, a drum controlled cable 31 is connected with the' carriage 26to shift the carriage inwardly along the guideway' when this cablel isdrawn in, and the tension in the hoisting cable 35 is utilized to shiftthe carriage outwardly when cable 3l is paid out. In this instance,however, the hoisting cable passes over a sheave 38 around a sheave 39carried by a bracket 40 secured to the carriage and having its endfixed, as at 41, at a fixed point, preferably on the guides 27a. Thus,the working tension in the hoisting cable 35 tends to shift the carriageand dipper handle outwardly. The operation of the shovel, equipped inthis manner, is substantially the saine as that above described.

Various changes may be made in the einbodiments of the invention abovedescribed, without departing from or sacrificing any of the advantagesof the invention as defined in the following claims.

I claim:

l. In a power shovel, the combination of a boom, a dipperfand dipperhandle, a pivotal support therefor movable relative to. said boom, ahoisting cable connected adjacent the free end of said handle to swingsaid handle and adjacent the pivotal support to shift said support, andmeans for controlling the position of said support relative to the boonrf 2. In a power shovel, the combination of a boom, a dipper and dipperhandle, a pivotal support therefor movable relative to said boom, ahoisting cable connected adjacent the free end of said handle to swingsaid handle and adjacent the pivotal support to shift said support, andmeans including a line of cable associated with said support forcontrolling the position of said support.

3. In a powershovel the combination with excavating means including aclipper and dipper handle and a pivotal support for said handle movablesubstantially horizontally, of means actuated bythe weight of saidexcavating means/to/inove said support in one directiononly in anyposition of said support, and 'means for /controlling such movement andfor moviii/gf said support in the other direction y 4. A power shovelAhaving a dipper and dipper handle, a pivotal support for said handle, ahoisting gear operable to swing said dipper about said support andconsti tutii'ig the sole actuating means for shifting said support' inone direction only, in any position thereof, and means for controllingthe position of said support.

5. A power shovel having a dipper and dipper handle, a pivotal supportfor said handle, a hoisting gear operable to swing said ldipper aboutsaid support and coni stituting the sole actuating means for shittingsaid support in one direct-ion only, in any position thereof, and meansincluding ,a line of cable for controlling the positiony of saidsupport.

6. A power shovel having a dipper and dippei' handle, a pivotal supportfor said handle, means including a line of cable associated with saiddipper and dipper handle adjacent said support for shifting said supportin one direction only when said cable is drawn in, and a dipper hoistingcable responsive to a release of tension in said cable for shifting saidsupport in the other direction when said first named cable is paid out.

7. A power shovel having a dipper and dipper handle, a pivotal supportfor `said handle, means including a line of cable for shiftingsaidsupport in one direction whenk said line of cable is drawn in, and meansincluding a second line of cable operable by the weight of the dipper inany position of said support for shifting said support in anotherdirection only when said first cable is paid out.

8. A power shovel having a dipper andy .or said` dipper handle, aypivotal support handle, means including a line of'cable for shiftingsaid support in one direction, and means including a hoisting cable forraising and lowering said dipper and for shifting said support inanother direction only, in-v dependently of whether saiddipper is beinglraised or lowered.

9. A power shovel having a hoisting drum and an auxiliary drum, a dipperand dipper handle, a pivotal support for said handle. a

cable assoc'ated with said dipper handle adi,

jacent said support and adjacent said dipper and connected with saidhoistingdrum for raising and lowering said dipper and for named line ofl.lot

shifting said support, and a cable connected i with said auxiliary drumand with said support for controlling the position of said support. v

10. A power shovel having a hoisting drum and an auxiliary drum, aVdipper and dipper liandlea pivotal support for said handle, a line ofcable connected with said hoisting drum and with said handle adjacentthe dipper and support for shifting said support in one direction, and aline of cable connected with said auxiliary drum for shitting saidsupport in another direction.

1l. A power shovel having a hoisting drum and an auxiliary drum, adipper and dipper handle, ja. pivotal support for said handle, a line ofcable connected with said hoist-ing drum and with said handle adjacentthe dipper and support for shifting said support, and a line ofcableassociated with said aux'liary drum for controlling the positionof' said support.

12; A power shovel having a hoisting drum, a dipper and dipper handle, apivotal support for said handle,- a line of cable connected with saidhoisting drum and with said -handle adjacent the dipper and lsupport torshifting said support, and means for controlling the positionof saidsupport.

13. A power shovel having a boom, a dipper and `dipper handle mountedthereon for swinging and shifting movements, two drums mounted on saidboom for rotation in unison, a dipper hoisting cable connected with oneof said drums, mea-ns including a cable connected with the other of saiddrums and associated with said dipper handle through which said handleis biased toward shifting movement in one direction by the tension insaid hoisting i;ble and means -ior controlling such shifting movementand toi-.shitting said handle in another directon. 14. A power shovelhaving a boom, a dipper and dipper handle mounted thereon for swingingand shifting movements, means lincluding a cable for shitting saidhandle iu one direction` means including a cable Jfor shitting saidhandle in another direction,l

a dipper hosting cable, and a drum having portions ot differentldiameters connected respectively with said hoisting cable and one ot'said other cables whereby the working tension in said hoisting cable isutilized to shift said dipper handle.

15. A power shovel having a boom, two interconnected drums of differentdiameters mounted thereon, a dipper and dipper handle mounted on saidboom, for swinging and shitting movements, a dipper hoisting cableconnected with the larger of said drums, a. second cable connected withthe smaller of said drums and associated with said dipper handle toshift said handle outwardly, and means including a third cableassociated with said dipper handle for shifting said handle inwardly.

16. In' a power shovel the combination of ing cable for moving saidD aninclined boom, a dipper and dipper handle, a pivotal support thereformovable transversely of said boom, a dipper hoisting cable for swingingsaid dipper about said suppor-t and for movin said support in onedirection only, independently of the angular relation between saiddipper handle and boom,and means for controlling such movement and formoving said support in the other direction.

17. LIn a power shovel the combination of a' boom.,` a dipper and dipperhandle, a pivotal support therefor movable relative to said boom,meansincludinof a dipper hoistsupport in one direction only, and meansoperable to move said support in the other direction only but releasableto permit movement of said support under the influence of said hoistingcable. f

18. In a power shovel the comb'nation of an inclined boom, a dipper anddipper handle, a pivotal support for said handle mounted on saidy boomfor substantially horizontalmovement, a dipper hoisting cable,connections between said cable and support for moving said support inone direction only, and means including another cable for shifting saidsupport in another direction.

I 19.- ln a power shovel the combination Vot' an inclined boom, a dipperand dfpperhandle, a pivotal support forsaid handle movable substantiallyhorizontally, a dipper hoisting cable, connections between said cableand said support for moving said support outwardly only, and mea-ns forcontrolling such movement and for movng said support inwardly. 1

In Witness whereof, l hereunto subscribe my name this 23rd day of July,1921.-

WALTER FERRIS.

